Compilare: user.c:5:5: warning: built-in function ‘log’ declared as non-function [enabled by default] int log[501][C+1],rez[C+1],aux[1001],s[C+1]; ^ user.c: In function ‘add’: user.c:19:11: warning: variable ‘o’ set but not used [-Wunused-but-set-variable] int i,o=0; ^ user.c: In function ‘main’: user.c:30:27: warning: unused variable ‘r’ [-Wunused-variable] int i,j,o,z,n,x,cmmdc,r,exp,ct,e,div; ^ user.c:30:21: warning: unused variable ‘cmmdc’ [-Wunused-variable] int i,j,o,z,n,x,cmmdc,r,exp,ct,e,div; ^ user.c:31:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("indep.in","r",stdin); ^ user.c:32:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("indep.out","w",stdout); ^ user.c:47:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:49:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^